The English spoken in the United States is only slightly different from spoken in Britain.
Exploring ________ space is exciting, yet dangerous. There is _______need for both robots and humans for space exploration.
It is difficult to imagine his ______ the decision without any consideration.
It is worth considering what makes “convenience” foods so popular, and ______ better ones of your own.
Bill suggested ______ a meeting on what to do for the Shanghai Expo during the vacation.
I still remember ______ to the Famen Temple and what I saw there.